Articles by Scott Hebert

  2. NTP and Your Xen-based Linux VM

    Posted on in System Administration

    As every system administrator is aware, keeping precise time on your servers can be critical. For example, if you use QueueMetrics for your Asterisk-based call center and the QM and MySQL servers are running with different times, users will notice confusing behavior as calls seem to arrive in the future …

  4. WordPress 3.0.1 Fixes Category Base Bug

    Posted on in System Administration

    Official WordPress LogoOn one of the WordPress-based websites I maintain, I have removed the category base so that, when browsing a category the url doesn't end with /category/category-slug/. I accomplished that by putting a single '.' in the "Category base" text box of the Permalinks admin page. This worked fine until I …

  5. WordPress Permalinks Not Working

    Posted on in System Administration

    Official WordPress LogoWhile setting up a new blog for an old site the other day, I ran into a situation where the main page would work, but individual posts would result in a 404 (page not found) error. Checking the error log revealed that Apache could not find the file it was …

  6. Show Cisco Interface Status and Traffic Rates Only

    Posted on in Networking

    I would hope there is a better way to do this. The other day, I had a need to see all the interfaces on a router and how much input and output traffic they were passing. This just seems like something that should be built in, but I've not seen …

  7. Configuring Syslog for Your Cisco Routers and Switches

    Posted on in System Administration

    Configuring your syslog server to accept logging output from your Cisco routers and switches requires a few basic steps. We'll assume that you are using a new server and haven't made any previous changes to the syslog configuration. I use <acronym title="Red Hat Enterprise Linux">RHEL</acronym> 5 most …

  8. tshark Fails: Interface is Not Up

    Posted on in System Administration

    This problem happened on a Mac Mini running OS X 10.4 (Tiger) not too long ago. The user was trying to run tshark against interface en2 — a USB <acronym title="Network Interface Card">NIC</acronym>. The tshark command produced the following output.

    # tshark -w /tmp/slap -i en2
Capturing …

  9. Cisco Input and Output Queue Drops

    Posted on in Networking

    This seems to be a pretty common problem for Cisco users. Not that Cisco devices have more queue drop problems, just that more Cisco users are a little confused by the information generated in the show interface command.

    Specifically, we're talking about the lines that look something like this:

    Input …

  11. Two Random Asterisk-Related SQL Queries

    Posted on in voice

    I hate losing useful SQL queries, so I tend to save them. Ever so often, I stumble across a file of queries from some work I was doing months ago. The following two queries are just such a case. I was analyzing some call data for a call center that …

  13. Is Microsoft Security Essentials for Business?

    Posted on in IT Management

    Considering the economy and the crunch that many IT departments are feeling, it is no surprise that many small to medium businesses are curious about using Microsoft's free security product as a replacement to the enterprise security solutions they have been using. Individual businesses will have to decide if Microsoft …

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